I'm still getting parts together for my rig. I need to find a good low restriction two-way ball valve. The plan is to have the quiet, stock clock mode to run the CPU loop through a 3x12 rad. Change the position of the ball valve and the water gets routed through a dual-block TEC heat exchanger sort of like the one shown in this thread. I've got four 168 watt TECs and two 320 watt Mean Wells and another 3x12 rad to cool the hot side of the TEc block. It will be interesting to see what kind of temps the TECs will provide at load.